Heater with draft control



Aug. l2, 1930. Y J..B. SMITH 157725469- HEATER WITH DRAFT CONTROL Filed Oct. 8, 192B Patented Aug. 12, 1930 emes i y' Josnrn B.fs1yr1rH,'oFsALT LAKE CITY," UTAH`r HEATERWITH DRAFT ooN'rRoL- AAppiic'mimn filed' october-.8, '1928.- `seri'fui-No.,"afweet, i' l' v This invention relatesto adraftl control for heaters and is lparticularly applicable` brooder stoves- Where a veryl closewregulation of heat is required,'though its utility isnt 5 restrictedvthereto; ,The inventionvembodies additionsand improvementsfor those stoves forming vthe subjectsof .my-U.V S. Patents Numbers 1,642,565and 1,700,183.v

The principal objects of thepre'sentlinvenf-i.

.m tion. are to provide:

First, A-heater wherein regulatedby means Tof draft passages con- -Vtrolledfby a series ofdampersvvhichare operably interconnected With ,each other.,

\ controlled in common, automatically, bytherf '.mostatic'means. i i

Third,-,Means for adjustingy theyvarious Y dampers, so Vthat their movements-:relatively 20 to one another maybe varied Withincomp'ar.- atively Wide limits..V I i -1 f Fourth, An apparatus Which-.shallbe simlpleeicientandeconomical. Y s l i The .features fforgvvhichl the protectionY of V2:5 Letters kPatent` is desirednre;colleetively grouped inthe kclaims concludingthisgspecation.; j -Y N In the drawing, illustratesfone bodiinentoffthelnventiorl, "L

30v L Fig.1representslafverticalcenter-section taken from frontL to .b'ack;

Fig. 2,'averticall sectonftaken on line 2 2, Fig.13, partsin theforeground v and' Within the ffnolfset :broken lline, being i 35 shown inl elevation.V i#

Fig; 3, atopplan; y

d Figs.. landf 5,l fragmentary portions of Figs, land 2 respectively, showing"falternate f 40 'Positionspop'arts;

'Figs'- 36,V .affragme .tary Yiltiloii I 0f Fig. .il substantially included Within. the broken, line ,H6 anddi'avvn to anenlargfedscale; 1 Lafront'elevationcorresp'ondin `to Second, A- serie's ofinterconnected dampers fj Fig. 8,2%: plti` paifuyfinfsectionf lisjin representationsi'in my UzfS. patents herein.- 50- before mentioned, yet the componentgpartsof the stovel proper, in."the.:derentdravvingm arerepresentativegof `one another.` v

Referring; to the presentdrawing," 20 indicates .the body ofthestovesupportedbn Athe base21, surrounded bylthej duplexdrum 234;, mentioned in,};my lsaid BatentjNo.. 1,700,183. Extending along 4the-sides fof.'V thestove Vfrom top to bottom, andpreferabl'y diametrically :Opposite sede' @then are Y'Cleiiw the dwn. Vdraft passages'25, ":These leadinto the ash chamber26,beneath'thegrateQf landareopen I at the topsl Fltendingi into vtheiirechamber.

- 30 lronothe` top` 29 andhayingan inlet mouth thefho'tblastconduitl.,1gl 65 Rigidly supported enfthejftlop y9,'are the standards 32fand 34. in' which are fulcrumed twin levers `35 and' e 36, respectively', these being infoperative `engagenient with 1 each other andwithj'ftheiyoke 37',- lfor',insta,nce,"by `70 means of'` the pivotvpin 38T.; Thegtwin levers may-alsobecalleddovvn draft levers.- To the yoke may be pivotedgtheflower l"ends fof' links 39, lwhose `upper endsymay;l be pivoted Iat 40 tothe vlever 4.1, which maybe rigidly kkattached lto theplatedamper42.` Damper 42 may be VVp'ivote'dtzrit 45 in, the smokeflue 43, the latter being preferablymounted on, the top 29.-'1`-he 'i y* y,the adjusting ynutslf andfO Acapable of being varouslypostioned alongthefrod, so f sirene@ 91.115,11 @Wefableeiielh be i gaging member such as the-adjustable wingnut-58 which allowsthe end of the hot blast lever to have a certain amount of motion, or else no motion at all, relatively to the damper 57.

In the outer extremities ofA the levers y i and 36are loosely carried the threaded stems 59, which at their lower -extremitiesare'attaehed tothe dampers 60. Engaging memb ers, such as wing nuts 61, adjustably/ posi.- tloned on the stems 59, permit the travelv of Y theleversf Vandf3'6 relatively to the dampers 60, to be varied as desired from 'zkero-tomaXie' mum.

systemv of levers previously'described, by* mountingone end thereof'on'the previously mentioned pin`38'. The master levermay be fulcrumedfat 1a, convenient point, such` as 63 in the standardsh.4,l so as to give the desired ratio; of motion to the said lever-'sys'tem. "Tolthe opposite end'o'thefmaster lever maybe adju'stablyfaste'nedbyfa wing nut 71, one end Y of rod 67 whichl extends ytoftheI'no'vable mem:- fber 68 of-the'thermo'stat 69. f Y Y When v the therm'osta't.imparts- 'downward movement totherod 67, the outer extremities of the levers-55` and'V 36are depressed,ithereby tendingtoclose the dampers 60 when'- the wing 'nuts 61 arefin'theposltions relatively to y rsterns'59, as shown. Howevenas thenutsfl are screwed upward on'thestemsV 59, it is" possibleft'o y prever-1t the`r dampers60 from receiving any motion, from the levers.'

i The:samemotion ofthe levers 35 and 36 causes the' yoke 37 to be. lifted,- therebypushing'gupwardly on the links 39, Vand'y causing the' lever 41 to be raised'.V 'This brings the .dampers42 and 46 ultimately ytothe` positions 'shown Yin Figi. '4. Simultaneously, thestem '48 is ,pulled upwardly, "thus'depressing the forward end Yof the bent vleverl 52 and causl'ing' the damper 57 to ybeseated'on the inlet tol thejhot'blastconduit 31:. When vthe lever A41 `movesfdownwardly, Vdure to' its overebal.- ance, it bears'on the nut 4921s show-nin-Fig.

51,'and'causes the damper 57 to be lifted-from By means of the nuts 49 and 50 on the'stein f 48', rand by means of the nut- 58' on' the lstem f`5'6", the relative motions ofthe dempers 42"'an'd 46, 'and of the damper` 57 may bei adjusted i* to' suit the required conditions."`

The-extended' arm 70 of thelever 41A may A master lever 62 "may belconnected to the` ,tive operating levers.

be made of sufficient length to counterbalance the master lever 62 with its rod 67, and the various dampers. The fulcrums of the various levers are positioned as desired, to give the proper ratio of movement to the damper assembly.

The hover 72 may be similar to the one shown in U. S. Patent No. 1,700,183.

The various pivot bearings may be made rather loose so as to allow sufficient play for the movement of the levers.

Whilea specificv embodiment of my Vinventionis herein shown and described, it is to be understood that various changes could be made therein without departing from the uspirit and scope ofthe invention as defined in theclams.

Having fully described my invention, what I `.claim is:

1. A heater having, in combination, a fire chamber, downY draftV conduitsl leading into spacebelew t-he fire chamber, a'hotblas't conduit leading into the upper part of said fire chamber, a dampening, opening defined in the smoke iue of said` heater, dampers for said dow-n draft conduits, a damper for said hot blast conduit, adarnper for said dampening opening', a system of interconnected operating levers, and individual adjusting devices Vbetween said dampers and the respec- 2. A'heater havingin combination,-down draft' conduits, a hot'blast conduit, a smoke flue withpivoted coacting dampers therein, an arm'protru'ding rigidly from" onefof. said pivoted dempers, afdamper for-said hotV blast conduit, a lever for the hotblast damper, a

connectingrod extending adjustably 1from said llietblast'leverto' sa1d arm,'twin levers V'cmiirxected"tosaid arm, and dampers or'said down draft conduits adjustablymountedon said twin levers; -v j Y 3. The combinationwithaheater, oftwin levers fulcrume'd onr said heater, a :smoke flue havingwcoacting plate Adempers I mounted therein, aarm'extending `from one of ythe v plate dampers, a flexible connection :between said-'twin levers andvsaid arm, al hot blast conduit extending into said heater, aV damper for said h'otblast` conduit, alever operative u on said hot blast damper and. an-adjusta le connecting. rod extending yfrom'the last mentioned leverto said arm. f

4. The combinationwith a heater, of twin levers fulcrumed on said heiatera smoke flue having coactmg plate dempers mounted Vthereinyopenings: defined: in one ofsaid ,plate damperaanarm extending from Vthe other said yplate damper, a flexiblefeonnection begtween said twinzlevers and `Vsaid'armfa hot 'blast conduit extending, into saidhe'ater, a

damper for said hot 'blast' vconduitgfa"lever operative upon said hot blast damper and an *adjustable 'connecting rod'. extending from the Vlast mentioned lever to said arm.

15 `VJOSEPH B. SMITH.

5. A heater having in combination, a fire chamber, down draft conduits leading into space below the fire chamber, a hot blast con-v duit leading into ther upper part of said fire 5 chamber, adamper in the smoke flue of said heater, down draft dampers, a hot blast f damper, a'system of `interconnected operating levers, individual adjusting devices between said dampers and the respective opery 10 ating levers,'a master lever connected to said operating levers, and a thermostat operative upon said master lever.` A v In testimony whereof, I sign my namel hereto. Y 

